Spool or bobbin



(No Model.)

H. S. FROST.

SPOOL OR BOBBIN.

No. 458,971. Patented Sept. 1, 1891.

WITNESSES I N V'EJVTOR gmW Mia WM; @QfM.

UNITED STATES PATENT QFFICE.

HENRY S. FROST, OF \VATERTOVN, CONNECTICUT.

SPOOL OR BOBBIN.

SPECIFICATION forming part of Letters Patent No. 458,971, datedSeptember 1, 1891.

Application filed March 5, 1891. $erial No- 383,86fi. (No model.)

To all whmn it may concern.-

Be it known that I, HENRY S. FROST, a citizen of the United States,residing at Watertown,in the county of Litchfield and State ofConnecticut, have invented certain new and useful Improvements in Spoolsor Bobbins; and I do hereby declare the following to be a full, clear,and exact description of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an inexpensive and durablespool or bobbin, more especially adapted for use in textilemanufacturing, which will wholly avoid the difficulty heretoforeexperienced of the heads of the spools checking and becoming rough inuse, thereby breaking the thread or silk, will avoid all expense andloss of time in re turni ng, varnishing, and smoothing the heads afterthey have been run a short time, will allow the silk to pass over theedge without friction, and which will last for practically an unlimitedlength of time.

WVith these ends in view I have devised the spool having a metal-coveredhead, of which the following description, in connection with theaccompanying drawings, is a specification, numerals being used todesignate the several parts.

Figure 1 is a section of the shank of a spool, showing the inner side ofthe head in elevation, the metal cap having been placed in position, butnot closed down, and a metallic spring placed between the cap and thehead; Fig. 2, aside elevation of the head,the spring, and the cap notset to place,being in section; Fig. 3, asimilar View after the cap hasbeen set to place; Fig. 4, a plan view of the top of the head of acompleted spool, showing one mode of locking the cap against rotarymovement; Fig. 5, a similar View showing another mode of locking the capagainst rotary movement; Fig. 6, a section corresponding with Fig. 2, arubber band or cushion being interposed between the cap and head insteadof a metallic spring, as in the otherform and Fig. 7 is an elevation ofa spool or bobbin complete.

The fact that it has been impossible to prevent the heads of spools fromchecking and roughing up in use frequently after but a very short runhas been a source of great inconvenience and expense in all kinds oftext ile manufacturing. N o matter how carefully selected or wellseasoned the wood has been, the heads have almost invariably checked andcracked, necessitating great loss of time and expense in re-turning,smoothing, and varnishing the heads. This objection I overcome entirelyby placing metal caps upon the heads, which I lock firmly in position,and prevent the cap from becoming loose on the head by interposingbetween the cap and head a suitable spring, which may be of either metalor rubber, and which will act to fill in the space between the head andcap when the wood shrinks, and thus prevent any loosenoss of the capupon the head.

1 denotes the head of the spool, and 2 a metallic cap therefor. This capis drawn to cup shape from a disk of sheet metal, a hole 3 beingordinarily punched at the center.

e denotes a spring which I interpose bctween the head and the cap beforethe latter is closed to place. This spring may be either a metallicspring, as shown in Figs. 1, 2, and 3, orarubber band, as shown in Fig.6. hen a metallic spring is used, one end of the spring is turned inwardat an angle, as at 5, and is engaged in a suitable notch in theperiphery of the head. When a rubber spring is used, I preferably turndown a portion of the periphery of the head, leaving a shoulder 6,against which the inner edge of the band rests, as clearly shown in Fig.6. After the spring and cap have been placed in position upon the head,as shown in Figs. 1, 2, and 6, the cap and spring are set firmly toplace upon the head by the action of suitable dies, as clearly shown inFigs. 3, 4, and 5. It is of course well understood that more or lessshrinking of the wood is certain to take place in use. By interposingsprings, however, between the heads and the caps the space between themwhen the wood shrinks is taken up, and looseless of the caps upon theheads is wholly prevented. As these spools or bobbins are used inenormous quantities, the saving effected by the use of cheaper woodsbecomes an important consideration. In ordinary bobbins only the hardestwoods can be used; but when the heads are covered by metallic capscheaper grades of wood will .do just as well. The caps are lookedagainst turning on the heads by striking portions of the metal of thecaps into the heads. This may be done by striking in lips of metal 7, asin Fig. 4, alternate lips being pointed in 0pposite directions, so as toinsure the cap against movement in either direction, 011., if preferred,the metal may be struck inward at the edges of the cap, as shown in Fig.5.

Having thus described my invention I claim' 1. A spool or bobbin havingits head cov ered with a metallic cap and having interposed between theperiphery of the head and the cap a suitable spring, whereby loosenessof the cap-is prevented when the wood shrinks.

HENRY S. FROST.

lVitnesses:

TRUMAN P. BALDWIN, JAMES B. WooLsoN.

